Самоподібний режим фрагментації металів при інтенсивній пластичній деформації

• Дата: 2019
• Автор: Khomenko, A. V.
• Формат: Стаття
• Мова: English; Ukrainian
• Опубліковано: Publishing house "Academperiodika" 2019
• Теми: grain boundary; dislocation; phase transition; phase diagram; internal energy; additive noise; self-similarity; -; межа зерна; дислокацiя; фазовий перехiд; фазова дiаграма; внутрiшня енергiя; адитивний шум; самоподiбнiсть
• Онлайн доступ: https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019333
• Назва журналу: Ukrainian Journal of Physics

In the framework of nonequilibrium evolution thermodynamics, the influence of additive fluctuations on the kinetics of structural defects under severe plastic deformation has been studied. The applied method is a new one for the description of fragmentation modes and corresponding self-organization processes. It is found that a fragmented metallic specimen demonstrates a self-similar behavior, which results in the formation of a grain structure with various grain sizes. Such a behavior takes place provided that the probability distribution for the grain boundary density has a power-law dependence. A comparison of the results obtained in the Itˆo and Stratonovich forms demonstrates the absence of qualitative changes in the behavior of the system.